Home / 21,762.06-30,021.40-15,780.61

Finding the Fourth Proportional to 21,762.06, 30,021.40 and 15,780.61

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Solution

The fourth proportional to 21,762.06, 30,021.40 and 15,780.61 is: 21,769.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,762.06 : 30,021.40 = 15,780.61 : x
  2. Step 2: Convert to fraction form
    21,762.06/30,021.40 = 15,780.61/x
  3. Step 3: Cross multiply
    21,762.06x = 30,021.40 × 15,780.61
  4. Step 4: Simplify right side
    21,762.06x = 473,756,005.05
  5. Step 5: Solve for x
    x = 473,756,005.05/21,762.06
  6. Step 6: Final answer
    x = 21,769.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.